The Percept of Pain Essay -- Biology Essays Research Papers

The Percept of Pain: Where does it come from? In class we have discussed the concept of pain, concluding that a conflict between what the brain anticipates occurring and what actually occurs has the potential to cause the perception of pain. Furthermore, it was suggested that genetics might have a role in the experience of pain, particularly when applied to the discussion of phantom limb pain. However, I found these inferences a bit unsatisfying and walked away with more questions than answers. Where does chronic pain come into the picture? Why is a stimulus that is painful for one person not for another? And the question that puzzled me the most: how, from a neurobiological perspective, can an individual experience pain in her arm if she was born without one? Pain, a component of the somatosensory system, is defined by the International Association for the Study of Pain as "an unpleasant sensory and emotional experience associated with actual or potential tissue damage, or described in terms of such damage" (1). The perception of pain serves as a defense system to maintain homeostasis, warning of injury that should be avoided and/or treated. Injured limbs actually inhibit voluntary movement to promote necessary healing processed (2). So essential is the painful response that those individuals born with congenital pain insensitivity do not react to pain, often resulting in severe, permanent tissue damage, and even premature death. A crucial concept in the definition of pain is that it is indeed a perception, therefore involving the brain's rumination and elaboration on corresponding input. This may be paralleled to another sensory perception, vision. Although the optic nerve head should cause a "hole" in an individual's... ...ally cynical about notions that are not physiologically observable, I am surprisingly excited by the idea of a neuromatrix and look forward to rethinking my pervious understandings of the nervous system's workings. It may be interesting to see how the I-function is involved with this process and why pain treatments such as biofeedback have been known to produce positive results. References This paper reflects the research and thoughts of a student at the time the paper was written for a course at Bryn Mawr College. Like other materials on Serendip, it is not intended to be "authoritative" but rather to help others further develop their own explorations. Web links were active as of the time the paper was posted but are not updated. Contribute Thoughts | Search Serendip for Other Papers | Serendip Home Page http://serendip.brynmawr.edu/cgi-bin/comments